40 , 000 , 000 = 4.0 X 1 0 7 A n s w er
4 ← 7 0 , 000 , 000 = 4 × 1 0 7
The number 40,000,000 can be expressed in scientific notation as 4.0 × 10^7. This is done by identifying the significant figure and counting the decimal places moved. Therefore, the final answer is 4.0 × 10^7.
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